What is a BEC and what do they do in the RC hobby?
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- Опубліковано 18 лип 2018
- An explanation of what a BEC is, the difference between an integrated and stand-alone unit and how they are used in RC.
Stand-alone BEC's: www.rcjuice.com/motor-esc/bec...
Surface ESC's: www.rcjuice.com/motor-esc/car...
Aircraft ESC's: www.rcjuice.com/motor-esc/air...
Questions? Shoot sus an e-mail!: www.rcjuice.com/contacts/ - Наука та технологія
Excellent video! I really appreciate how you spelled everything out nicely in a step by step fashion without skipping or glancing over anything.
First time I have heard anyone explain this where I actually understand it! Great job :)
Enjoyed the video. I’ve watched several videos attempting to understand what a BEC. You did a better job than most in explaining what it is and the different types. My understanding is complete. Thanks
Thank you for watching and for the feedback! We try to keep it simple so glad our approach was successful!
I'm new to the RC hobby world and I must say, your explanation was fantastic. Very clear explanation, thank you so much !!!
Thank you for watching!
Very informative! Finally after about 10 years and giving up, it's clear as day. It was like a mental block in my brain has been removed.
Thank you for watching! We always try to make straight, to the point videos so your feedback is appreciated,
Great video,put simply enough for me to have a much better understanding how they actually work an how to benefit from using one👍
First Hello, And THANK YOU.I have been flying for few years and never needed or took time to learn what the difference in BECs are ( U, S, or L.) How ever I did and do know what I BEC is and what it does. I had my daughter just ask what a SBEC was and went to search it and seen this video. I am Glad I did. Thank you for keeping people informed In the RC world and for the Videos. Knowledge is a wonderful thing for some one to have. Videos like this are so great for people just getting into the hobby / interested in what the hobbies are all about / or even some that may just need refreshing or info about something they heard and didn't remember or never heard so didn't know YET.. I just wanted to say thank you for videos like this. Great place to teach and learn.
Hey Bruce, thank you very much for taking the time to write this comment. Believe me we appreciate the feedback and are thrilled to know that our videos are accomplishing their intended goal of informing the RC community. We'll be working one more and more videos, stay tuned!
Love the rc juice videos they always impart a wealth of knowledge that really is useful to us rc enthusiasts.
Thank you for watching and for your kind comment!
Very well explained! Good you talked about capacitors too. Thanks!
Excellent explanation👍
I always wondered what they are and how they operate. This helped me out tremendously.
Thank you.
Thank you for watching!
Excellent video and very helpful, thanks RCJuice
Thank you for the awesome video I really needed to learn about the BEC as far as in regards to the servo. I'm glad I subbed. You da man
Thank you for watching, glad it was a helpful video!
Not long ago, I had a strong servo that was pulling more current than the in-built ESC-BEC could deliver, causing the Rx to go into failsafe mode. Since then, I use a dedicated BEC or a separate receiver/servo battery, as standard practice. You will amazed at how much current a large servo can pull, and how much better it will work with enough juice!
Wow Thanks! I was wondering what that little bulb was that came with my FMS 120A ESC…”a Glitch Buster!” Now I know! I converted my 6S Warbird to an 8S and the new ESC will give me more go. Thank you!
Thanks friend! I needed a refresher
this explanation ix very great and so detail thanks rc juice for share this tips, very helpfull
Thank you for watching!
Very clear and very appreciated. thank you.
Excellent Explanation! Thank you tons.
Our pleasure, thank you for watching Rudy!
Thank you for explaining this.
Nice video and this answers all my previous problems . please thanks
Thank you for watching, and please feel free to e-mail us at support@rcjuice.com if you have any other questions.
Thank you. I see these ESCs for sale online and was wondering how they got the power to the receiver!
Thanks, great job!👍
Just remember. If your BEC on your ESC can go up to 8.4v and you have an 8.4v high voltage servo you need to make sure your receiver can handle 8.4v. Your receiver may only be able to take 6.0v or 7.4v. You can only go as high as the lowest rating on an individual component, be it your receiver, servo and your ESC. The ESC is the power source for your receiver and servo. When programming your BEC check your servo rating AND your receiver rating and program your ESC’s BEC accordingly.
you should keep creating this kind of stuff sir. I mean it!
Very clearly explained sir thanks but I'm still not sure how to complete my conversion which I'm trying to attempt on my original hornet rc car. But that's not your fault you made me understand more on how the bec is used and how it works so for that thank you.😇
very good helped alot. subbed
Very useful info., and great video
Thank you for watching!
*****RESPECT = Great Presentation **
Nice, now I know how BEC works..thanks..
Thank you for watching Carlos!
I am building a glider, and planning on using a 5V battery with a 5V-8V Receiver. Do I still need a BEC, can I just wire the battery straight into the reciever.
Thanks,that helped me a lot.
Our pleasure, thank you for watching!
Tons of valuable info in such an understandable lecture and I'm a butt head. Thanks
Sir I have a question.I have a Power hd 25kg servo and I ordered a hobbywing 1080 with programming card and a castle bec 10a with a default 5.1V. Do i need to buy the Castle link to program bec into 7v or Ill just program the esc with 7v servo option with its programming card without buying the castle link?
What oz. Per in. Of torque servo would you reccomend using a BEC for in an RC Crawler?
Hello Friend, thanks for the explanation. You said you programm BEC on 7.4V. is it right all the electric component (receiver, Servo etc) must have a minimum voltage of 7.4 or hoger? All my component beside the receiver (6.5v) have it and i was wondering if i can programm the BEC on 7.4v? I have a hobbywing exrun XR8 sct. Thanks a lot.
My 5V BEC is read 5.35 V on multimeter, I am going to use it on 5V rated FPV video receiver. Should I get another BEC or is it okay?
Excellent VIDEO!!!!, 😊🤙🇦🇺🍻
Thank you!
Adjustable high-power BEC listed on Spektrum 130A Firma ESC? The specs list that it is adjustable. ESC info lists that the BEC voltage is 6V/4A. If it can be adjusted, what is the max adjustment? This number is the determining factor on how I purchase an upgrade Steering Servo. I cannot for the life of me find the answer to this. Hope you can help. It’s been 24 hours of searching for the answer to this question.
Thanks for sharing this great info! Do you know how i can test a glitch buster capacitor for operating good or if broken? Also, how will i know if i need a 3 amp bec or a 5 amp bec?
Check the section titled "testing a capacitor" here: www.ifixit.com/Wiki/Troubleshhoting_logic_board_components Good question on the BEC, the short answer is that to know for sure you'd need to do some live testing with a current meter on your current setup. For most 1/10 and 1/8 applications 3A is plenty, but that being said BEC's are like ESC's in that if budget/room allows, bigger is better.
just wondering now,I've got a xlx2 8s 33.6v 1100kv in my x maxx..if I was going to replace the stock servo for a upgraded one would I benefit from a separate castle bec??
Not really needed in your application, the XLX2 has a very robust built-in BEC.
Great video .. if you have adjustable volt on your esc and set it to 7.4 volt will this effect the reciver you are using ... I have a traxxas reciver and plan the add a castle esc and motor and want to set the output voltage to 7.4 volt will this damage my receiver?
It can. Most newer receivers are HV capable, but you do need to find the specs for the specific receiver you are using. Traxxas usually does not publish those specs so you may need to reach out to them, it is likely they are NOT HV capable.
Hello I'm very much so new to the RC world .
I have an unbranded rc car 1:10 scale. The electrical board doesn't work. So I wanted to do an upgrade on it with speed control, receiver, and servo. But I have a few questions like, can I keep my same transmitter (it has a bind button on it) also it has a 390 motor on it but I wanted to upgrade it as well to a 550. And I wanted to look into a 2s or 3s liPo set up.
Just wondering but , Overall I'm to get another one.
Just wanted to use that one as a "learning" one
Please shoot us an e-mail at support@rcjuice.com , there's a lot of questions there and we can best handle via e-mail.
Great intervention, thanks. On receiver Futaba R202GF there is a battery input 3 pin connector, Do you mean it should remain unconnected if I have a esc with a 3 pin connector on channel 2 ? Nothing is explained on Futaba user guide ..... unbelievable !
That is correct. The "Batt" input is used in applications where you are either running a separate BEC (separate from the ESC), or for a fuel/nitro application where battery power needs to be introduced. If using an ESC with a built-in BEC then no, you do not need to plug anything into that port.
Hi! You are not able to double the voltage - regarding the 5:30 in the movie. Both are connected together in parallel so you have still 6V, but there is risk of current flow between ESC and additional BEC if any voltage difference is present.
That threw me for a loop too when I heard it.
also what bec do i need to step up voltage . i run 2s but and my esc is 6v bec and i want to step upto 7.4v. Do becs step up and down voltage thanks
@Bippolas Beige cool thanks will try this
Quick question, can a Glitch Buster be plugged into the Data/Bind port? I'm out of channels so just wondering if this can be done through bind port.
Yes they can.
Another great informational video 👊. Much appreciated as always. I wanted to ask your opinion on motor vs ESC amps and voltage ratings. Is it essential to have the ESC rated at the same or higher amperage as the motor? Also is it unsafe to run a motor slightly past it's voltage rating with a higher cell lipo pack?🤘🤘😎💪👊👊
Thank you for watching Rich!! Very good question, we get questions related to that subject almost daily and do plan on making a video addressing this entire topic as there is quite a bit to it. One of the first points that is important to understand is that a motor is always going to pull all the amps it wants, regardless of it’s rating. In fact, if you look at a data log from a setup you’d be amazed to see how high the current spikes right at startup. It can go into a few hundred amps, although this only happens for a fraction of a second. The voltage ratings on ESC’s must be adhered to, the firmware can only work with certain voltages so if an ESC is rated to 6S, you cannot exceed 6S on it or you can destroy the ESC. On a motor, there is nothing at all that actually limits what voltage you can run on it, the specifications are there as a guideline for what you can safely run the motor at but it is possible to burn up a motor if it is over-geared when running it on or even below the maximum rated voltage for that motor. You can take a motor that is spec’d for 4S and run it on 20S if you want, it’s going to work but will quickly heat up and self-destruct. This is why it is so critical to monitor temps on brushless setups, particularly when it is a new setup that you are not familiar with. At the end of the day your motor temps are the number one indicator of the health of the system, as long as the motor temps are staying in check (we like to keep them under 170F) it does not matter what voltage you are running as far as the motor is concerned. As far as the ESC rating, this is one area where bigger is better as it will just give the ESC a better chance of surviving if you really push the motor. Remember, your setup is going to pull all the current it wants regardless of the rating of any of the components, the current draw is dictated by the voltage, motor KV and effective gear ratio (taking into account pinion/spur, diff, trans, tire size etc.). A common misconception is that an ESC “sends” power to a motor, it simply channels the power and it’s critical to monitor temps in order to make sure you are not going beyond the limitations of the system.
RCJuice thanks so much for the detailed answer about this 😂!!! I missed the notification for your response and truly appreciate you taking the time to explain things clearly 👊. This Crazy HOT weather has posed even more challenge with keeping temps in a safe/efficient range. The bone dry powdery dirt has meant more wheelspin and higher sustained RPMs. I'm trying to become more proficient with my understanding of electronics overall and your response is most helpful 👍. I generally gear my rigs to about 150-160F and like my ESCs below 140-150 tops🤔. Really LOVE the Hobbystar 1730 and 1480kv. My 3-8s rated 160A Hexfly Hex6 ESC has overheated the last 2 outings with the 1730. I'll try gearing down to a 17-18T and getting out before it's 100F+. Thanks again for your help and keep up the great videos!!! 🤘🤘😎💪👊👊
Our pleasure Rich!! We had our Traxxas Ultimate Desert Racer out this weekend at Don Pedro where it was plenty hot. Running the 4092 in 1730KV on 8S and temps stayed cool enough all day, some reckless fun with 8S and no overheating. The high-temps and sustained higher-RPM due to the loose dirt definitely do make a difference in what you can get away with, but you are smart to always watch those temps. As long as you keep your temps in check these electronics can last indefinitely.
RCJuice I haven't been to Don Pedro in years, but recall it getting quite HOT during the summer 😨. Just pictured you doing huge 8s drifts with the UDR 😰🤘🤘. That would make great video add ins to your informational vids🤔. That's awesome to hear the 1730 can take that voltage 👌. I'll need to check out the ESC you're running. Don't have any 1/7 - 1/5th scales but my friends certainly do. Thanks again for the great information, truly appreciated 😂!!! 🍻😎💪👊👊
Oh yeah, especially this past weekend "Hot" would be a massive understatement. You are spot-on with your "drift" assumptions!! There were some nice open dirt areas where I had that thing going sideways at crazy speeds, as long as it doesn't hook on anything she will floar over everything but when it does catch she'll cartwheel for daaaaays!!
Quick question. Need some help .. do the bec wires allways stay plugged into the ESC or do you unplug them after its callibarted .. just wondering because I only have one spot for either the 3 wire servo or that on my ESC/receiver. I'm a bit confused to be honest
The ESC lead needs to stay plugged in so it can receive a signal from the RX. Channel 2 is always throttle, 1 is steering and the rest can be used as "power" outlets if you are not utilizing the channel for anything else.
Nice video clear and easy to follow.
I have my Externel BEC set at 7 volts.
Can I just plug my standerd lights in the reciever or will the voltage be to high.
That depends on the voltage rating of the lights, most newer lights can go to at least 10V so it should be OK but check the ratings to be sure.
@@RCJuice thanks man...and keep on educating the world of rc ..
Great info sir! Question... Installing a HW 1080 BEC in my TRX4 Sport and I have a Traxxas 2260 high output BEC. Should I NOT plug the HW ESC into the Traxxas BEC where the stock ESC was plugged in? Don't want to blow anything up. Thank you!
No it's OK to plug the HW ESC into the Traxxas BEC.
please mention the capacity reference value like 1500uF 15 V?
I need help can I use a castle bec with nimh battery pack or do I need to switch to lipo battery or what should I do
As long as the voltage of your battery pack is greater than the output you are using on the BEC then it is fine, the BEC does not "care" where the voltage is coming from and will still work fine.
My reciver can only handle up to 6v but my servo needs around 8.4 to operate. Can I run a BEC from the battery to the reciver so it doesn't blow. Then run another BEC from the reciver( on a channel for the servo) to give the servo the needed 8.4V?
You would want to wire a BEC to the battery and run the power directly to the servo, and then only run the signal wire from the receiver to the servo.
Thank you
Two seperate 6v parallel circuits doubles the valtage????
Okkk...now i understand 😜... Thx nice vid
I bought a hobbystar 70kg servo for my losi dbxl-e, can i just install it on my rc with out any other upgrades. Or will it damage my the esc or reciever?
Installing as is will be perfectly fine and won't require additional upgrades for use.
When you are using a stand alone BEC how is it possible to plug two power wires into a Receiver, doubling your voltage. Wouldn’t you just eliminate plugging the ESC plug (going to the receiver) altogether?
Great video!!
You Still need to connect the ESC (with the power wire disconnected) into the receiver) into channel 2. That's (generally) the channel used to control the signal from the receiver TO the ESC. If it's not plugged in you won't have any speed control.
I have a truck, with a led lightbar attached, everytime i turn the servo left or right, the led would blink for a split second same goes when i pull the throttle at once. im using a HW1060 which i believe comes with a 2A bec, will an external bec with higher current rating resolve my issue? thanks.
That definitely sounds like you need an external BEC, many servos are incredibly power-hungry and it sounds like it's drawing enough to pull power from your light setup.
@@RCJuice so with ana external bec, will i be able to have a single on-off switch for the rc? i suppose ill just leave the esc on-off switch to on position all the time, and use the new on-off switch from the external bec right?
@@hauwkeautogallery Generally not, you usually wire a BEC directly to the battery leads so it would require a separate switch.
Question
If i'm using only one ESC with no external BEC and disable the red wire on my speed controller, will the receiver now receive the full voltage from the batteries or will the receiver just not power on?
The receiver would not receive any power in this scenario.
@@RCJuice thanks I'm new to this kind of stuff.
Can a bec be used for a dual battery setup..if one battery dies can it switch to auxiliary battery???
No, that would require separate circuitry. A BEC is simply a voltage regulator.
great video , although you didnt show or say where or how to use the ext.BEC when using a esc with a BEC you mentioned taking the power wire off but thats it, where do you plug the ext BEC to what channel or whether it goes to the usual esc channel or now since you have removed the wire and your using the esc still but also an ext bec where can u plug it in to, just any other channel ??????????????????? totally confused please help im a nooob to to all this electronic new ways thankx
Yes, some receivers will have a "batt" terminal on them (a left-over from the nitro days), but you can plug it into ANY free channel.
I have kraton 6s v5 and the bec is set at 7.4 volts stock but my local hobby shop turned it down to 6 volts said it was better. Everything is still stock on my truck, do you think 7.4 volts would be better? I want maximum performance
As long as your servo and receiver are rated for 7.4V then it is recommended, it provides more speed/torque from your servo and is more efficient.
@@RCJuice thanks for reply!
My RC car is throttling lightly without even pulling the trigger on my radio. I was told it is one of three things…A bad radio, interference from the servo, or the ESC’s BEC, but the radio is only a few months old…When I install a glitch buster capacitor to the receiver everything is fine. But that is a band aid. What do you think the problem may be? Is it possible that I need to increase my ESC’s BEC voltage in order to eliminate this problem without having to use a glitch buster?
It's possibly an interference issue, but most likely an issue with calibration. Make sure you you set your throttle trim all the way down/to zero before calibrating, afterward if you happen to turn up the throttle trim at all it can cause symptoms like you mention but this just sounds like a calibration issue: ua-cam.com/video/MIpvyi8vjHk/v-deo.html
@@RCJuice the thing is it’s intermittent. Happens every once in a while. I feel like if it was a throttle trim issue it would do this every time it was powered on right?
@@floridalife7877 Yes, if it's intermittent then it's likely not a trim issue but we would still recommend re-calibrating the ESC.
@@RCJuice thanks. I’ll recalibrate and see
can I use a lm2596 buck converter with my 3s lipo batery to power a 5v flight controller?
We don't have any experience with those, from what I know you can but unfortunately I cannot say for sure. Sorry we can't be more specific but do not want to provide bad info.
Now if you put 6 volts and 6 volts into receiver it should still be 6 volts you should only get more amps. Now if it where in series you would get 12 but as long as it is black wire to black wire volts won't change, Am I misunderstand something? thanks .
Sorry but not sure if we understand the question. Any time you connect 2 batteries yes, you can put them either in series or parallel. In series you will double the voltage and have the same capacity/run-time as one battery, and if you connect them in parallel you have the same voltage as 1 battery, but the run-time of 2 batteries. A BEC just steps the voltage down to the required voltage for your application.
How exactly are you doubling your voltage. The connections are parallel so you should only be doubling your amp capacity to the receiver, volts should be unchanged. What am I missing?
It depends on the receiver, it's true that in some scenarios it does run in parallel but it's a safe rule to never do just in case.
Mike Kennedy j
how do you wire up the BEC so a single server runs at 7.4 and 2 other servos run at 6v? i keep burning out the micro servos since they are 6amp max, the main steering servo can go up to 8v. my speed controller has a BEC and i have a castle 2.0 wp but i cannot figure out how to separate them.
You need to run 2 different BEC's. You can run the servos all off the same receiver, but you need to connect the power wires from each servo to the BEC with the appropriate voltage. No way to do this without 2 BEC's though.
@@RCJuice I actually figured it out! I used a bec bypass adapter. It plugs only ground/signal into your esc. Power goes direct to servo through bec.
My esc powers the two separate 6v servos with its internal bec!
I’ll try to find a picture of the adapter I used to link it!
@@ed0c Yes, that is doing what we mentioned by only using the signal via the receiver, and powering through the BEC. Nice work :)
@@RCJuice thank you! I made my own adapter after some research and a bunch of videos like yours. Much appreciated for the replies!
Can i use a 12 v battery with a bec on a car witch use 9.6 v battery?
No, a BEC is not capable of handling the current needed to drive a motor. The BEC is just for supplying power to radio/servos/accessories.
Is it safe to use converters like xt60 to xt90 adapters.
Adapters are OK to use, but keep in mind that the overall connection rating is only going to be as good as the smallest connector, so if you are working with something that requires an XT90 then any XT60's in the setup would not be appropriate.
@@RCJuice The esc is xt 60 and the battery is xt 90. Battery has 5000 mah 4s or 3s has xt 90 while 3000 mah has only xt 60.
does a bec need to be turnsd off when not running? please.
No
What’s the black thing coming from the esc with the kinda protective cap over it?
They are capacitors, sometimes mounted on the ESC itself but often mounted remotely.
RCJuice cool thanks. So when we install an esc that has one coming from it do we just secure it down somewhere?
@@jct4111 Correct, you can just use some double-sided tape as you do for the ESC. Some guys will zip-tie it to the wires as well, as long as it's secured and not flopping around you are good to go.
RCJuice perfect thanks a lot
Great video maybe bec understandably
Thank you for watching Luis!
Can i power my run cam transmitter through this circuit
Yes you can, as long as the voltage matches the requirement you can.
Is it okay to use a UBEC with 2 wires only not 3 wires just like the castle bec?
Yes, most BEC's only have 2 input wires.
I mean the ones that is going to the reciever..
Can i used bec or ubec 5amp for servo 25 kg?
5amp is sufficient for that servo.
Great inormative review 👏👏
If i see capacitors on my Castle BEC- Does that means it has a glitch buster integrated in it?..🤔
Thx..😎
Thank you for watching! No, the capacitors on your ESC do serve a similar function, but that is for the ESC power and not for the power it sends to your receiver via the BEC. If you want to run a glitch buster for your radio, you must run the separate one on the receiver itself.
@@RCJuice
I refered to my BEC and not the ESC..
Got the Castle Creations BEC 2.0 15A...
I see a capacotor on it..
@@ETAI106 Sorry!! In general yes, the caps on your BEC will perform the same function.
Can we running both bec and glitch buster on reciever?
Yes. The BEC is going to provide the power, and a glitch-buster is independent of this, as long as you have the available channels on the RX it is no problem.
@@RCJuice thank for info😘😘😘
What about if I just want to run my Onetomanyrc light bar on one
As long as the output of your BEC provides voltage within the rating of the lightbar it will work great.
It's rated for 11.1 - 14.4 the I'm waiting on a for 12vbec picked 12 for longevity
Thanks yo
Where can I get a glitch buster?
www.rcjuice.com/hobbystar-glitch-buster.html
I have that remote and receiver
What are c ratings for Bec voltage
BEC's do not have C-ratings, they will generally have a voltage and an amperage rating.
is a bec a voltage regulator
Yes.
Are the hobbystar motors good motors compared to hobbywing?I know you sell them but give me a honest answer 😀
We truly believe the HobbyStar motors are as good as the Hobbywing motors. There are some unique models in each line and they do have some cool new crawler motors that are a step-up (HobbyStar is not far behind with a similar release), but when it comes to comparable motors we truly feel the HS quality is on par with HW and any other high-end motor on the market. We sell more HobbyStar batteries and motors than all other products and have excellent feedback on them.
@@RCJuice thank you for your reply.
I'm going to have to try one they are cheaper in price that's always good if the quality is equal😀👍
Nice video man. My stomach prefers bacon egg and cheese.
That's a lot of bec's and esc's
I’m not dumb anymore
so basically the bec is like a buck converter ?
so it's just a buck converter
Can I power 1.5 gram servo from FC 3.3 v onboard bec?
Depends on the servo requirements, but 3.3V may be too low for a servo.